A Reappraisal of Mating Call Differentiation in Hyla cadaverina (=Hyla californiae) and Hyla regilla

M. J. Littlejohn

doi:10.2307/2406502

A Reappraisal of Mating Call Differentiation in Hyla cadaverina (=Hyla californiae) and Hyla regilla

Evolution ◽

10.2307/2406502 ◽

1971 ◽

Vol 25 (1) ◽

pp. 98 ◽

Cited By ~ 6

Author(s):

M. J. Littlejohn

Keyword(s):

Hyla Regilla ◽

Mating Call

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Multivariate Geographic Variation of Mating Call in Populations of the Pacific Tree Frog (Hyla regilla)

Copeia ◽

10.2307/1440714 ◽

1965 ◽

Vol 1965 (2) ◽

pp. 129 ◽

Cited By ~ 21

Author(s):

Wade F. Snyder ◽

David L. Jameson

Keyword(s):

Geographic Variation ◽

Tree Frog ◽

Hyla Regilla ◽

Mating Call ◽

The Pacific

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Spacing and calling in Pacific tree frogs, Hyla regilla

Canadian Journal of Zoology ◽

10.1139/z75-187 ◽

1975 ◽

Vol 53 (11) ◽

pp. 1519-1527 ◽

Cited By ~ 54

Author(s):

Carl L. Whitney ◽

John R. Krebs

Keyword(s):

Local Area ◽

Hyla Regilla ◽

Behavioral Interactions ◽

Mating Call ◽

Control Situation ◽

Tree Frogs ◽

Empty Area

Calling male Pacific tree frogs space out more than if they were distributed at random on the available calling sites. When new frogs are added to an area that is already occupied by some calling males, fewer additional frogs call than in a control situation where frogs are added to an empty area. This shows that behavioral interactions between frogs limit the number that call in a local area. A further experiment showed that the mating call played through loudspeakers is sufficient to inhibit additional frogs from calling. We conclude that calling leads to spacing out, which in turn limits the density of calling frogs in a local area.

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The role of the "encounter" call in spacing of Pacific tree frogs, Hyla regilla

Canadian Journal of Zoology ◽

10.1139/z80-010 ◽

1980 ◽

Vol 58 (1) ◽

pp. 75-78 ◽

Cited By ~ 15

Author(s):

Carl L. Whitney

Keyword(s):

Hyla Regilla ◽

Mating Call ◽

Mating Calls ◽

Tree Frogs

When calling male Pacific tree frogs come closer together than about 50 cm, they switch from the mating call to the encounter call. After an exchange of encounter calls, one of the frogs may submit by retreating or ceasing to call, or they may fight, after which the loser submits. To investigate the role of the encounter call in maintaining spacing, I compared the responses of calling males lo playback of encounter calls and mating calls. During 60-s playbacks, most frogs responded initially to both vocalizations by uttering encounter calls, but they were more likely to respond further to encounter calls by either attacking or submitting. I suggest that the encounter call serves to reduce the amount of time that calling frogs remain close together and, as a consequence, to enhance their chances of attracting females.

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